• pelya@lemmy.world
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    4 days ago

    Yeah I thought the same thing, but no. People who actually launch weather balloons swear off hydrogen like a plague, because apparently it explodes while you are filling the balloon.

    • CanadaPlus@lemmy.sdf.org
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      4 days ago

      That makes sense, although in wartime it would matter less. You can also generate it fairly portably with ferrosilicon and acid.

      It’s worth mentioning a football field or whatever of Mylar won’t be free. Big balloons retail for hundreds on their own according to a quick search.